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Merge branch 'develop'

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pull/296/head
Marek Kotewicz 10 years ago
parent 2eedc330bf 688030ecb6
commit 3cdf108057
15 changed files with 1292 additions and 763 deletions
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  1. 961
      dist/ethereum.js
  2. 20
      dist/ethereum.js.map
  3. 2
      dist/ethereum.min.js
  4. 55
      example/event.html
  5. 317
      lib/abi.js
  6. 33
      lib/const.js
  7. 55
      lib/contract.js
  8. 44
      lib/event.js
  9. 11
      lib/filter.js
  10. 154
      lib/formatters.js
  11. 79
      lib/types.js
  12. 113
      lib/utils.js
  13. 55
      lib/web3.js
  14. 110
      test/event.js
  15. 8
      test/utils.filters.js

961
dist/ethereum.js vendored
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20
dist/ethereum.js.map vendored
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2
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55
example/event.html
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@ -27,25 +27,63 @@
var contract = web3.eth.contract(address, desc);
function test1() {
// "{"topic":["0x83c9849c","0xc4d76332"],"address":"0x01"}"
web3.eth.watch(contract).changed(function (res) {
});
};
function test2() {
// "{"topic":["0x83c9849c"],"address":"0x01"}"
web3.eth.watch(contract.Event).changed(function (res) {
});
};
function test3() {
// "{"topic":["0x83c9849c"],"address":"0x01"}"
contract.Event().changed(function (res) {
});
};
function test4() {
// "{"topic":["0x83c9849c","0000000000000000000000000000000000000000000000000000000000000045"],"address":"0x01"}"
contract.Event({a: 69}).changed(function (res) {
});
};
function test5() {
// "{"topic":["0x83c9849c",["0000000000000000000000000000000000000000000000000000000000000045","000000000000000000000000000000000000000000000000000000000000002a"]],"address":"0x01"}"
contract.Event({a: [69, 42]}).changed(function (res) {
});
};
function test6() {
// "{"topic":["0x83c9849c","000000000000000000000000000000000000000000000000000000000000001e"],"max":100,"address":"0x01"}"
contract.Event({a: 30}, {max: 100}).changed(function (res) {
});
};
function test7() {
// "{"topic":["0x83c9849c","000000000000000000000000000000000000000000000000000000000000001e"],"address":"0x01"}"
web3.eth.watch(contract.Event, {a: 30}).changed(function (res) {
});
};
function test8() {
// "{"topic":["0x83c9849c","000000000000000000000000000000000000000000000000000000000000001e"],"max":100,"address":"0x01"}"
web3.eth.watch(contract.Event, {a: 30}, {max: 100}).changed(function (res) {
});
};
// not valid
// function test4() {
// function testX() {
// web3.eth.watch([contract.Event, contract.Event2]).changed(function (res) {
// });
// };
@ -63,5 +101,20 @@
<div>
<button type="button" onClick="test3();">test3</button>
</div>
<div>
<button type="button" onClick="test4();">test4</button>
</div>
<div>
<button type="button" onClick="test5();">test5</button>
</div>
<div>
<button type="button" onClick="test6();">test6</button>
</div>
<div>
<button type="button" onClick="test7();">test7</button>
</div>
<div>
<button type="button" onClick="test8();">test8</button>
</div>
</body>
</html>

317
lib/abi.js
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@ -21,191 +21,57 @@
* @date 2014
*/
// TODO: is these line is supposed to be here?
if (process.env.NODE_ENV !== 'build') {
var BigNumber = require('bignumber.js'); // jshint ignore:line
}
var web3 = require('./web3');
var utils = require('./utils');
var types = require('./types');
var c = require('./const');
var f = require('./formatters');
var web3 = require('./web3'); // jshint ignore:line
BigNumber.config({ ROUNDING_MODE: BigNumber.ROUND_DOWN });
var ETH_PADDING = 32;
/// method signature length in bytes
var ETH_METHOD_SIGNATURE_LENGTH = 4;
/// Finds first index of array element matching pattern
/// @param array
/// @param callback pattern
/// @returns index of element
var findIndex = function (array, callback) {
var end = false;
var i = 0;
for (; i < array.length && !end; i++) {
end = callback(array[i]);
}
return end ? i - 1 : -1;
};
/// @returns a function that is used as a pattern for 'findIndex'
var findMethodIndex = function (json, methodName) {
return findIndex(json, function (method) {
return method.name === methodName;
});
};
/// @returns method with given method name
var getMethodWithName = function (json, methodName) {
var index = findMethodIndex(json, methodName);
if (index === -1) {
console.error('method ' + methodName + ' not found in the abi');
return undefined;
}
return json[index];
};
/// Filters all function from input abi
/// @returns abi array with filtered objects of type 'function'
var filterFunctions = function (json) {
return json.filter(function (current) {
return current.type === 'function';
});
};
/// Filters all events form input abi
/// @returns abi array with filtered objects of type 'event'
var filterEvents = function (json) {
return json.filter(function (current) {
return current.type === 'event';
});
};
/// @param string string to be padded
/// @param number of characters that result string should have
/// @param sign, by default 0
/// @returns right aligned string
var padLeft = function (string, chars, sign) {
return new Array(chars - string.length + 1).join(sign ? sign : "0") + string;
};
/// @param expected type prefix (string)
/// @returns function which checks if type has matching prefix. if yes, returns true, otherwise false
var prefixedType = function (prefix) {
return function (type) {
return type.indexOf(prefix) === 0;
};
};
/// @param expected type name (string)
/// @returns function which checks if type is matching expected one. if yes, returns true, otherwise false
var namedType = function (name) {
return function (type) {
return name === type;
};
var displayTypeError = function (type) {
console.error('parser does not support type: ' + type);
};
/// This method should be called if we want to check if givent type is an array type
/// @returns true if it is, otherwise false
var arrayType = function (type) {
return type.slice(-2) === '[]';
};
/// Formats input value to byte representation of int
/// If value is negative, return it's two's complement
/// If the value is floating point, round it down
/// @returns right-aligned byte representation of int
var formatInputInt = function (value) {
var padding = ETH_PADDING * 2;
if (value instanceof BigNumber || typeof value === 'number') {
if (typeof value === 'number')
value = new BigNumber(value);
value = value.round();
if (value.lessThan(0))
value = new BigNumber("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", 16).plus(value).plus(1);
value = value.toString(16);
}
else if (value.indexOf('0x') === 0)
value = value.substr(2);
else if (typeof value === 'string')
value = formatInputInt(new BigNumber(value));
else
value = (+value).toString(16);
return padLeft(value, padding);
};
/// Formats input value to byte representation of string
/// @returns left-algined byte representation of string
var formatInputString = function (value) {
return web3.fromAscii(value, ETH_PADDING).substr(2);
};
/// Formats input value to byte representation of bool
/// @returns right-aligned byte representation bool
var formatInputBool = function (value) {
return '000000000000000000000000000000000000000000000000000000000000000' + (value ? '1' : '0');
};
/// Formats input value to byte representation of real
/// Values are multiplied by 2^m and encoded as integers
/// @returns byte representation of real
var formatInputReal = function (value) {
return formatInputInt(new BigNumber(value).times(new BigNumber(2).pow(128)));
};
var dynamicTypeBytes = function (type, value) {
// TODO: decide what to do with array of strings
if (arrayType(type) || type === 'string') // only string itself that is dynamic; stringX is static length.
return formatInputInt(value.length);
return f.formatInputInt(value.length);
return "";
};
/// Setups input formatters for solidity types
/// @returns an array of input formatters
var setupInputTypes = function () {
return [
{ type: prefixedType('uint'), format: formatInputInt },
{ type: prefixedType('int'), format: formatInputInt },
{ type: prefixedType('hash'), format: formatInputInt },
{ type: prefixedType('string'), format: formatInputString },
{ type: prefixedType('real'), format: formatInputReal },
{ type: prefixedType('ureal'), format: formatInputReal },
{ type: namedType('address'), format: formatInputInt },
{ type: namedType('bool'), format: formatInputBool }
];
};
var inputTypes = setupInputTypes();
var inputTypes = types.inputTypes();
/// Formats input params to bytes
/// @param contract json abi
/// @param name of the method that we want to use
/// @param abi contract method inputs
/// @param array of params that will be formatted to bytes
/// @returns bytes representation of input params
var toAbiInput = function (json, methodName, params) {
var formatInput = function (inputs, params) {
var bytes = "";
var method = getMethodWithName(json, methodName);
var padding = ETH_PADDING * 2;
var padding = c.ETH_PADDING * 2;
/// first we iterate in search for dynamic
method.inputs.forEach(function (input, index) {
inputs.forEach(function (input, index) {
bytes += dynamicTypeBytes(input.type, params[index]);
});
method.inputs.forEach(function (input, i) {
inputs.forEach(function (input, i) {
var typeMatch = false;
for (var j = 0; j < inputTypes.length && !typeMatch; j++) {
typeMatch = inputTypes[j].type(method.inputs[i].type, params[i]);
typeMatch = inputTypes[j].type(inputs[i].type, params[i]);
}
if (!typeMatch) {
console.error('input parser does not support type: ' + method.inputs[i].type);
displayTypeError(inputs[i].type);
}
var formatter = inputTypes[j - 1].format;
var toAppend = "";
if (arrayType(method.inputs[i].type))
if (arrayType(inputs[i].type))
toAppend = params[i].reduce(function (acc, curr) {
return acc + formatter(curr);
}, "");
@ -217,118 +83,44 @@ var toAbiInput = function (json, methodName, params) {
return bytes;
};
/// Check if input value is negative
/// @param value is hex format
/// @returns true if it is negative, otherwise false
var signedIsNegative = function (value) {
return (new BigNumber(value.substr(0, 1), 16).toString(2).substr(0, 1)) === '1';
};
/// Formats input right-aligned input bytes to int
/// @returns right-aligned input bytes formatted to int
var formatOutputInt = function (value) {
value = value || "0";
// check if it's negative number
// it it is, return two's complement
if (signedIsNegative(value)) {
return new BigNumber(value, 16).minus(new BigNumber('ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff', 16)).minus(1);
}
return new BigNumber(value, 16);
};
/// Formats big right-aligned input bytes to uint
/// @returns right-aligned input bytes formatted to uint
var formatOutputUInt = function (value) {
value = value || "0";
return new BigNumber(value, 16);
};
/// @returns input bytes formatted to real
var formatOutputReal = function (value) {
return formatOutputInt(value).dividedBy(new BigNumber(2).pow(128));
};
/// @returns input bytes formatted to ureal
var formatOutputUReal = function (value) {
return formatOutputUInt(value).dividedBy(new BigNumber(2).pow(128));
};
/// @returns right-aligned input bytes formatted to hex
var formatOutputHash = function (value) {
return "0x" + value;
};
/// @returns right-aligned input bytes formatted to bool
var formatOutputBool = function (value) {
return value === '0000000000000000000000000000000000000000000000000000000000000001' ? true : false;
};
/// @returns left-aligned input bytes formatted to ascii string
var formatOutputString = function (value) {
return web3.toAscii(value);
};
/// @returns right-aligned input bytes formatted to address
var formatOutputAddress = function (value) {
return "0x" + value.slice(value.length - 40, value.length);
};
var dynamicBytesLength = function (type) {
if (arrayType(type) || type === 'string') // only string itself that is dynamic; stringX is static length.
return ETH_PADDING * 2;
return c.ETH_PADDING * 2;
return 0;
};
/// Setups output formaters for solidity types
/// @returns an array of output formatters
var setupOutputTypes = function () {
return [
{ type: prefixedType('uint'), format: formatOutputUInt },
{ type: prefixedType('int'), format: formatOutputInt },
{ type: prefixedType('hash'), format: formatOutputHash },
{ type: prefixedType('string'), format: formatOutputString },
{ type: prefixedType('real'), format: formatOutputReal },
{ type: prefixedType('ureal'), format: formatOutputUReal },
{ type: namedType('address'), format: formatOutputAddress },
{ type: namedType('bool'), format: formatOutputBool }
];
};
var outputTypes = setupOutputTypes();
var outputTypes = types.outputTypes();
/// Formats output bytes back to param list
/// @param contract json abi
/// @param name of the method that we want to use
/// @param contract abi method outputs
/// @param bytes representtion of output
/// @returns array of output params
var fromAbiOutput = function (json, methodName, output) {
var formatOutput = function (outs, output) {
output = output.slice(2);
var result = [];
var method = getMethodWithName(json, methodName);
var padding = ETH_PADDING * 2;
var padding = c.ETH_PADDING * 2;
var dynamicPartLength = method.outputs.reduce(function (acc, curr) {
var dynamicPartLength = outs.reduce(function (acc, curr) {
return acc + dynamicBytesLength(curr.type);
}, 0);
var dynamicPart = output.slice(0, dynamicPartLength);
output = output.slice(dynamicPartLength);
method.outputs.forEach(function (out, i) {
outs.forEach(function (out, i) {
var typeMatch = false;
for (var j = 0; j < outputTypes.length && !typeMatch; j++) {
typeMatch = outputTypes[j].type(method.outputs[i].type);
typeMatch = outputTypes[j].type(outs[i].type);
}
if (!typeMatch) {
console.error('output parser does not support type: ' + method.outputs[i].type);
displayTypeError(outs[i].type);
}
var formatter = outputTypes[j - 1].format;
if (arrayType(method.outputs[i].type)) {
var size = formatOutputUInt(dynamicPart.slice(0, padding));
if (arrayType(outs[i].type)) {
var size = f.formatOutputUInt(dynamicPart.slice(0, padding));
dynamicPart = dynamicPart.slice(padding);
var array = [];
for (var k = 0; k < size; k++) {
@ -337,7 +129,7 @@ var fromAbiOutput = function (json, methodName, output) {
}
result.push(array);
}
else if (prefixedType('string')(method.outputs[i].type)) {
else if (types.prefixedType('string')(outs[i].type)) {
dynamicPart = dynamicPart.slice(padding);
result.push(formatter(output.slice(0, padding)));
output = output.slice(padding);
@ -350,30 +142,18 @@ var fromAbiOutput = function (json, methodName, output) {
return result;
};
/// @returns display name for method eg. multiply(uint256) -> multiply
var methodDisplayName = function (method) {
var length = method.indexOf('(');
return length !== -1 ? method.substr(0, length) : method;
};
/// @returns overloaded part of method's name
var methodTypeName = function (method) {
/// TODO: make it not vulnerable
var length = method.indexOf('(');
return length !== -1 ? method.substr(length + 1, method.length - 1 - (length + 1)) : "";
};
/// @param json abi for contract
/// @returns input parser object for given json abi
/// TODO: refactor creating the parser, do not double logic from contract
var inputParser = function (json) {
var parser = {};
filterFunctions(json).forEach(function (method) {
var displayName = methodDisplayName(method.name);
var typeName = methodTypeName(method.name);
json.forEach(function (method) {
var displayName = utils.extractDisplayName(method.name);
var typeName = utils.extractTypeName(method.name);
var impl = function () {
var params = Array.prototype.slice.call(arguments);
return toAbiInput(json, method.name, params);
return formatInput(method.inputs, params);
};
if (parser[displayName] === undefined) {
@ -390,13 +170,13 @@ var inputParser = function (json) {
/// @returns output parser for given json abi
var outputParser = function (json) {
var parser = {};
filterFunctions(json).forEach(function (method) {
json.forEach(function (method) {
var displayName = methodDisplayName(method.name);
var typeName = methodTypeName(method.name);
var displayName = utils.extractDisplayName(method.name);
var typeName = utils.extractTypeName(method.name);
var impl = function (output) {
return fromAbiOutput(json, method.name, output);
return formatOutput(method.outputs, output);
};
if (parser[displayName] === undefined) {
@ -409,20 +189,17 @@ var outputParser = function (json) {
return parser;
};
/// @param method name for which we want to get method signature
/// @returns (promise) contract method signature for method with given name
var methodSignature = function (name) {
return web3.sha3(web3.fromAscii(name)).slice(0, 2 + ETH_METHOD_SIGNATURE_LENGTH * 2);
/// @param function/event name for which we want to get signature
/// @returns signature of function/event with given name
var signatureFromAscii = function (name) {
return web3.sha3(web3.fromAscii(name)).slice(0, 2 + c.ETH_SIGNATURE_LENGTH * 2);
};
module.exports = {
inputParser: inputParser,
outputParser: outputParser,
methodSignature: methodSignature,
methodDisplayName: methodDisplayName,
methodTypeName: methodTypeName,
getMethodWithName: getMethodWithName,
filterFunctions: filterFunctions,
filterEvents: filterEvents
formatInput: formatInput,
formatOutput: formatOutput,
signatureFromAscii: signatureFromAscii
};

33
lib/const.js
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@ -0,0 +1,33 @@
/*
This file is part of ethereum.js.
ethereum.js is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
ethereum.js is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with ethereum.js. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file const.js
* @authors:
* Marek Kotewicz <marek@ethdev.com>
* @date 2015
*/
/// required to define ETH_BIGNUMBER_ROUNDING_MODE
if (process.env.NODE_ENV !== 'build') {
var BigNumber = require('bignumber.js'); // jshint ignore:line
}
module.exports = {
ETH_PADDING: 32,
ETH_SIGNATURE_LENGTH: 4,
ETH_BIGNUMBER_ROUNDING_MODE: { ROUNDING_MODE: BigNumber.ROUND_DOWN }
};

55
lib/contract.js
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@ -22,8 +22,18 @@
var web3 = require('./web3');
var abi = require('./abi');
var utils = require('./utils');
var eventImpl = require('./event');
var exportNatspecGlobals = function (vars) {
// it's used byt natspec.js
// TODO: figure out better way to solve this
web3._currentContractAbi = vars.abi;
web3._currentContractAddress = vars.address;
web3._currentContractMethodName = vars.method;
web3._currentContractMethodParams = vars.params;
};
var addFunctionRelatedPropertiesToContract = function (contract) {
contract.call = function (options) {
@ -53,14 +63,14 @@ var addFunctionsToContract = function (contract, desc, address) {
var outputParser = abi.outputParser(desc);
// create contract functions
abi.filterFunctions(desc).forEach(function (method) {
utils.filterFunctions(desc).forEach(function (method) {
var displayName = abi.methodDisplayName(method.name);
var typeName = abi.methodTypeName(method.name);
var displayName = utils.extractDisplayName(method.name);
var typeName = utils.extractTypeName(method.name);
var impl = function () {
var params = Array.prototype.slice.call(arguments);
var signature = abi.methodSignature(method.name);
var signature = abi.signatureFromAscii(method.name);
var parsed = inputParser[displayName][typeName].apply(null, params);
var options = contract._options || {};
@ -75,12 +85,13 @@ var addFunctionsToContract = function (contract, desc, address) {
contract._isTransact = null;
if (isTransact) {
// it's used byt natspec.js
// TODO: figure out better way to solve this
web3._currentContractAbi = desc;
web3._currentContractAddress = address;
web3._currentContractMethodName = method.name;
web3._currentContractMethodParams = params;
exportNatspecGlobals({
abi: desc,
address: address,
method: method.name,
params: params
});
// transactions do not have any output, cause we do not know, when they will be processed
web3.eth.transact(options);
@ -112,8 +123,8 @@ var addEventRelatedPropertiesToContract = function (contract, desc, address) {
Object.defineProperty(contract, 'topic', {
get: function() {
return abi.filterEvents(desc).map(function (e) {
return abi.methodSignature(e.name);
return utils.filterEvents(desc).map(function (e) {
return abi.signatureFromAscii(e.name);
});
}
});
@ -122,27 +133,21 @@ var addEventRelatedPropertiesToContract = function (contract, desc, address) {
var addEventsToContract = function (contract, desc, address) {
// create contract events
abi.filterEvents(desc).forEach(function (e) {
utils.filterEvents(desc).forEach(function (e) {
var impl = function () {
var params = Array.prototype.slice.call(arguments);
var signature = abi.methodSignature(e.name);
var event = eventImpl(address, signature);
var signature = abi.signatureFromAscii(e.name);
var event = eventImpl(address, signature, e);
var o = event.apply(null, params);
return web3.eth.watch(o);
};
impl.address = address;
Object.defineProperty(impl, 'topic', {
get: function() {
return [abi.methodSignature(e.name)];
}
});
// this property should be used by eth.filter to check if object is an event
impl._isEvent = true;
// TODO: rename these methods, cause they are used not only for methods
var displayName = abi.methodDisplayName(e.name);
var typeName = abi.methodTypeName(e.name);
var displayName = utils.extractDisplayName(e.name);
var typeName = utils.extractTypeName(e.name);
if (contract[displayName] === undefined) {
contract[displayName] = impl;

44
lib/event.js
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@ -20,13 +20,47 @@
* @date 2014
*/
var implementationOfEvent = function (address, signature) {
var abi = require('./abi');
var utils = require('./utils');
return function (options) {
var inputWithName = function (inputs, name) {
var index = utils.findIndex(inputs, function (input) {
return input.name === name;
});
if (index === -1) {
console.error('indexed param with name ' + name + ' not found');
return undefined;
}
return inputs[index];
};
var indexedParamsToTopics = function (event, indexed) {
// sort keys?
return Object.keys(indexed).map(function (key) {
var inputs = [inputWithName(event.inputs, key)];
var value = indexed[key];
if (value instanceof Array) {
return value.map(function (v) {
return abi.formatInput(inputs, [v]);
});
}
return abi.formatInput(inputs, [value]);
});
};
var implementationOfEvent = function (address, signature, event) {
// valid options are 'earliest', 'latest', 'offset' and 'max', as defined for 'eth.watch'
return function (indexed, options) {
var o = options || {};
o.address = o.address || address;
o.topics = o.topics || [];
o.topics.push(signature);
o.address = address;
o.topic = [];
o.topic.push(signature);
if (indexed) {
o.topic = o.topic.concat(indexedParamsToTopics(event, indexed));
}
return o;
};
};

11
lib/filter.js
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@ -27,16 +27,17 @@ var web3 = require('./web3'); // jshint ignore:line
/// should be used when we want to watch something
/// it's using inner polling mechanism and is notified about changes
/// TODO: change 'options' name cause it may be not the best matching one, since we have events
var Filter = function(options, impl) {
this.impl = impl;
this.callbacks = [];
if (typeof options !== "string") {
// evaluate lazy properties
// topics property is deprecated, warn about it!
if (options.topics) {
console.warn('"topics" is deprecated, use "topic" instead');
}
// evaluate lazy properties
options = {
to: options.to,
topic: options.topic,
@ -46,8 +47,12 @@ var Filter = function(options, impl) {
skip: options.skip,
address: options.address
};
}
this.impl = impl;
this.callbacks = [];
this.id = impl.newFilter(options);
web3.provider.startPolling({call: impl.changed, args: [this.id]}, this.id, this.trigger.bind(this));
};

154
lib/formatters.js
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@ -0,0 +1,154 @@
/*
This file is part of ethereum.js.
ethereum.js is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
ethereum.js is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with ethereum.js. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file formatters.js
* @authors:
* Marek Kotewicz <marek@ethdev.com>
* @date 2015
*/
if (process.env.NODE_ENV !== 'build') {
var BigNumber = require('bignumber.js'); // jshint ignore:line
}
var utils = require('./utils');
var c = require('./const');
/// @param string string to be padded
/// @param number of characters that result string should have
/// @param sign, by default 0
/// @returns right aligned string
var padLeft = function (string, chars, sign) {
return new Array(chars - string.length + 1).join(sign ? sign : "0") + string;
};
/// Formats input value to byte representation of int
/// If value is negative, return it's two's complement
/// If the value is floating point, round it down
/// @returns right-aligned byte representation of int
var formatInputInt = function (value) {
var padding = c.ETH_PADDING * 2;
if (value instanceof BigNumber || typeof value === 'number') {
if (typeof value === 'number')
value = new BigNumber(value);
BigNumber.config(c.ETH_BIGNUMBER_ROUNDING_MODE);
value = value.round();
if (value.lessThan(0))
value = new BigNumber("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", 16).plus(value).plus(1);
value = value.toString(16);
}
else if (value.indexOf('0x') === 0)
value = value.substr(2);
else if (typeof value === 'string')
value = formatInputInt(new BigNumber(value));
else
value = (+value).toString(16);
return padLeft(value, padding);
};
/// Formats input value to byte representation of string
/// @returns left-algined byte representation of string
var formatInputString = function (value) {
return utils.fromAscii(value, c.ETH_PADDING).substr(2);
};
/// Formats input value to byte representation of bool
/// @returns right-aligned byte representation bool
var formatInputBool = function (value) {
return '000000000000000000000000000000000000000000000000000000000000000' + (value ? '1' : '0');
};
/// Formats input value to byte representation of real
/// Values are multiplied by 2^m and encoded as integers
/// @returns byte representation of real
var formatInputReal = function (value) {
return formatInputInt(new BigNumber(value).times(new BigNumber(2).pow(128)));
};
/// Check if input value is negative
/// @param value is hex format
/// @returns true if it is negative, otherwise false
var signedIsNegative = function (value) {
return (new BigNumber(value.substr(0, 1), 16).toString(2).substr(0, 1)) === '1';
};
/// Formats input right-aligned input bytes to int
/// @returns right-aligned input bytes formatted to int
var formatOutputInt = function (value) {
value = value || "0";
// check if it's negative number
// it it is, return two's complement
if (signedIsNegative(value)) {
return new BigNumber(value, 16).minus(new BigNumber('ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff', 16)).minus(1);
}
return new BigNumber(value, 16);
};
/// Formats big right-aligned input bytes to uint
/// @returns right-aligned input bytes formatted to uint
var formatOutputUInt = function (value) {
value = value || "0";
return new BigNumber(value, 16);
};
/// @returns input bytes formatted to real
var formatOutputReal = function (value) {
return formatOutputInt(value).dividedBy(new BigNumber(2).pow(128));
};
/// @returns input bytes formatted to ureal
var formatOutputUReal = function (value) {
return formatOutputUInt(value).dividedBy(new BigNumber(2).pow(128));
};
/// @returns right-aligned input bytes formatted to hex
var formatOutputHash = function (value) {
return "0x" + value;
};
/// @returns right-aligned input bytes formatted to bool
var formatOutputBool = function (value) {
return value === '0000000000000000000000000000000000000000000000000000000000000001' ? true : false;
};
/// @returns left-aligned input bytes formatted to ascii string
var formatOutputString = function (value) {
return utils.toAscii(value);
};
/// @returns right-aligned input bytes formatted to address
var formatOutputAddress = function (value) {
return "0x" + value.slice(value.length - 40, value.length);
};
module.exports = {
formatInputInt: formatInputInt,
formatInputString: formatInputString,
formatInputBool: formatInputBool,
formatInputReal: formatInputReal,
formatOutputInt: formatOutputInt,
formatOutputUInt: formatOutputUInt,
formatOutputReal: formatOutputReal,
formatOutputUReal: formatOutputUReal,
formatOutputHash: formatOutputHash,
formatOutputBool: formatOutputBool,
formatOutputString: formatOutputString,
formatOutputAddress: formatOutputAddress
};

79
lib/types.js
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@ -0,0 +1,79 @@
/*
This file is part of ethereum.js.
ethereum.js is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
ethereum.js is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with ethereum.js. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file types.js
* @authors:
* Marek Kotewicz <marek@ethdev.com>
* @date 2015
*/
var f = require('./formatters');
/// @param expected type prefix (string)
/// @returns function which checks if type has matching prefix. if yes, returns true, otherwise false
var prefixedType = function (prefix) {
return function (type) {
return type.indexOf(prefix) === 0;
};
};
/// @param expected type name (string)
/// @returns function which checks if type is matching expected one. if yes, returns true, otherwise false
var namedType = function (name) {
return function (type) {
return name === type;
};
};
/// Setups input formatters for solidity types
/// @returns an array of input formatters
var inputTypes = function () {
return [
{ type: prefixedType('uint'), format: f.formatInputInt },
{ type: prefixedType('int'), format: f.formatInputInt },
{ type: prefixedType('hash'), format: f.formatInputInt },
{ type: prefixedType('string'), format: f.formatInputString },
{ type: prefixedType('real'), format: f.formatInputReal },
{ type: prefixedType('ureal'), format: f.formatInputReal },
{ type: namedType('address'), format: f.formatInputInt },
{ type: namedType('bool'), format: f.formatInputBool }
];
};
/// Setups output formaters for solidity types
/// @returns an array of output formatters
var outputTypes = function () {
return [
{ type: prefixedType('uint'), format: f.formatOutputUInt },
{ type: prefixedType('int'), format: f.formatOutputInt },
{ type: prefixedType('hash'), format: f.formatOutputHash },
{ type: prefixedType('string'), format: f.formatOutputString },
{ type: prefixedType('real'), format: f.formatOutputReal },
{ type: prefixedType('ureal'), format: f.formatOutputUReal },
{ type: namedType('address'), format: f.formatOutputAddress },
{ type: namedType('bool'), format: f.formatOutputBool }
];
};
module.exports = {
prefixedType: prefixedType,
namedType: namedType,
inputTypes: inputTypes,
outputTypes: outputTypes
};

113
lib/utils.js
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@ -0,0 +1,113 @@
/*
This file is part of ethereum.js.
ethereum.js is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
ethereum.js is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with ethereum.js. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file utils.js
* @authors:
* Marek Kotewicz <marek@ethdev.com>
* @date 2015
*/
/// Finds first index of array element matching pattern
/// @param array
/// @param callback pattern
/// @returns index of element
var findIndex = function (array, callback) {
var end = false;
var i = 0;
for (; i < array.length && !end; i++) {
end = callback(array[i]);
}
return end ? i - 1 : -1;
};
/// @returns ascii string representation of hex value prefixed with 0x
var toAscii = function(hex) {
// Find termination
var str = "";
var i = 0, l = hex.length;
if (hex.substring(0, 2) === '0x') {
i = 2;
}
for (; i < l; i+=2) {
var code = parseInt(hex.substr(i, 2), 16);
if (code === 0) {
break;
}
str += String.fromCharCode(code);
}
return str;
};
var toHex = function(str) {
var hex = "";
for(var i = 0; i < str.length; i++) {
var n = str.charCodeAt(i).toString(16);
hex += n.length < 2 ? '0' + n : n;
}
return hex;
};
/// @returns hex representation (prefixed by 0x) of ascii string
var fromAscii = function(str, pad) {
pad = pad === undefined ? 0 : pad;
var hex = toHex(str);
while (hex.length < pad*2)
hex += "00";
return "0x" + hex;
};
/// @returns display name for function/event eg. multiply(uint256) -> multiply
var extractDisplayName = function (name) {
var length = name.indexOf('(');
return length !== -1 ? name.substr(0, length) : name;
};
/// @returns overloaded part of function/event name
var extractTypeName = function (name) {
/// TODO: make it invulnerable
var length = name.indexOf('(');
return length !== -1 ? name.substr(length + 1, name.length - 1 - (length + 1)) : "";
};
/// Filters all function from input abi
/// @returns abi array with filtered objects of type 'function'
var filterFunctions = function (json) {
return json.filter(function (current) {
return current.type === 'function';
});
};
/// Filters all events form input abi
/// @returns abi array with filtered objects of type 'event'
var filterEvents = function (json) {
return json.filter(function (current) {
return current.type === 'event';
});
};
module.exports = {
findIndex: findIndex,
toAscii: toAscii,
fromAscii: fromAscii,
extractDisplayName: extractDisplayName,
extractTypeName: extractTypeName,
filterFunctions: filterFunctions,
filterEvents: filterEvents
};

55
lib/web3.js
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@ -27,6 +27,8 @@ if (process.env.NODE_ENV !== 'build') {
var BigNumber = require('bignumber.js');
}
var utils = require('./utils');
var ETH_UNITS = [
'wei',
'Kwei',
@ -192,43 +194,11 @@ var web3 = {
_events: {},
providers: {},
toHex: function(str) {
var hex = "";
for(var i = 0; i < str.length; i++) {
var n = str.charCodeAt(i).toString(16);
hex += n.length < 2 ? '0' + n : n;
}
return hex;
},
/// @returns ascii string representation of hex value prefixed with 0x
toAscii: function(hex) {
// Find termination
var str = "";
var i = 0, l = hex.length;
if (hex.substring(0, 2) === '0x')
i = 2;
for(; i < l; i+=2) {
var code = parseInt(hex.substr(i, 2), 16);
if(code === 0) {
break;
}
str += String.fromCharCode(code);
}
return str;
},
toAscii: utils.toAscii,
/// @returns hex representation (prefixed by 0x) of ascii string
fromAscii: function(str, pad) {
pad = pad === undefined ? 0 : pad;
var hex = this.toHex(str);
while(hex.length < pad*2)
hex += "00";
return "0x" + hex;
},
fromAscii: utils.fromAscii,
/// @returns decimal representaton of hex value prefixed by 0x
toDecimal: function (val) {
@ -278,8 +248,15 @@ var web3 = {
return ret;
};
},
watch: function (params) {
return new web3.filter(params, ethWatch);
/// @param filter may be a string, object or event
/// @param indexed is optional, this is an object with optional event indexed params
/// @param options is optional, this is an object with optional event options ('max'...)
watch: function (filter, indexed, options) {
if (filter._isEvent) {
return filter(indexed, options);
}
return new web3.filter(filter, ethWatch);
}
},
@ -288,8 +265,10 @@ var web3 = {
/// shh object prototype
shh: {
watch: function (params) {
return new web3.filter(params, shhWatch);
/// @param filter may be a string, object or event
watch: function (filter, indexed) {
return new web3.filter(filter, shhWatch);
}
},

110
test/event.js
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@ -1,22 +1,124 @@
var assert = require('assert');
var event = require('../lib/event.js');
var f = require('../lib/formatters.js');
describe('event', function () {
it('should create filter input object from given', function () {
it('should create basic filter input object', function () {
// given
var address = '0x012345';
var signature = '0x987654';
var e = {
name: 'Event',
inputs: [{"name":"a","type":"uint256","indexed":true},{"name":"b","type":"hash256","indexed":false}]
};
// when
var impl = event(address, signature);
var impl = event(address, signature, e);
var result = impl();
// then
assert.equal(result.address, address);
assert.equal(result.topics.length, 1);
assert.equal(result.topics[0], signature);
assert.equal(result.topic.length, 1);
assert.equal(result.topic[0], signature);
});
it('should create filter input object with options', function () {
// given
var address = '0x012345';
var signature = '0x987654';
var options = {
earliest: 1,
latest: 2,
offset: 3,
max: 4
};
var e = {
name: 'Event',
inputs: [{"name":"a","type":"uint256","indexed":true},{"name":"b","type":"hash256","indexed":false}]
};
// when
var impl = event(address, signature, e);
var result = impl({}, options);
// then
assert.equal(result.address, address);
assert.equal(result.topic.length, 1);
assert.equal(result.topic[0], signature);
assert.equal(result.earliest, options.earliest);
assert.equal(result.latest, options.latest);
assert.equal(result.offset, options.offset);
assert.equal(result.max, options.max);
});
it('should create filter input object with indexed params', function () {
// given
var address = '0x012345';
var signature = '0x987654';
var options = {
earliest: 1,
latest: 2,
offset: 3,
max: 4
};
var e = {
name: 'Event',
inputs: [{"name":"a","type":"uint256","indexed":true},{"name":"b","type":"hash256","indexed":false}]
};
// when
var impl = event(address, signature, e);
var result = impl({a: 4}, options);
// then
assert.equal(result.address, address);
assert.equal(result.topic.length, 2);
assert.equal(result.topic[0], signature);
assert.equal(result.topic[1], f.formatInputInt(4));
assert.equal(result.earliest, options.earliest);
assert.equal(result.latest, options.latest);
assert.equal(result.offset, options.offset);
assert.equal(result.max, options.max);
});
it('should create filter input object with an array of indexed params', function () {
// given
var address = '0x012345';
var signature = '0x987654';
var options = {
earliest: 1,
latest: 2,
offset: 3,
max: 4
};
var e = {
name: 'Event',
inputs: [{"name":"a","type":"uint256","indexed":true},{"name":"b","type":"hash256","indexed":false}]
};
// when
var impl = event(address, signature, e);
var result = impl({a: [4, 69]}, options);
// then
assert.equal(result.address, address);
assert.equal(result.topic.length, 2);
assert.equal(result.topic[0], signature);
assert.equal(result.topic[1][0], f.formatInputInt(4));
assert.equal(result.topic[1][1], f.formatInputInt(69));
assert.equal(result.earliest, options.earliest);
assert.equal(result.latest, options.latest);
assert.equal(result.offset, options.offset);
assert.equal(result.max, options.max);
});
});

8
test/abi.filters.js → test/utils.filters.js
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@ -1,7 +1,7 @@
var assert = require('assert');
var abi = require('../lib/abi.js');
var utils = require('../lib/utils.js');
describe('abi', function() {
describe('utils', function() {
it('should filter functions and events from input array properly', function () {
// given
@ -36,8 +36,8 @@ describe('abi', function() {
}];
// when
var events = abi.filterEvents(description);
var functions = abi.filterFunctions(description);
var events = utils.filterEvents(description);
var functions = utils.filterFunctions(description);
// then
assert.equal(events.length, 1);
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